机电工程技术2024，Vol.53Issue(5)：25-29,5.DOI:10.3969/j.issn.1009-9492.2024.05.006
锥形内翅片管传热性能数值模拟研究
Numerical Simulation Study on Heat Transfer Performance of Conical Inner Finned Tube
摘要
Abstract
In response to the problems of low fin height,weak disturbance to the thermal boundary layer,and low heat transfer performance of traditional internally threaded finned tubes,based on computational fluid dynamics theory,fluent simulation software is used to compare the numerical simulation results of internally threaded finned tubes and a type of conical internally finned tubes at Reynolds numbers of 10 000 to 18 000.It is found that the heat transfer performance of conical internally finned tubes is much higher than that of internally threaded finned tubes.In addition,numerical simulations are conducted on the number of teeth,fin spacing,and fin height of the conical inner finned tube.It is found that when the number of teeth N=45,the Nu value of the conical inner finned tube is relatively large,about twice that of the bare tube.The smaller the fin spacing,the larger the Nu value.At L=0.6 mm,the Nu value reaches a larger value,which is approximately 1.6 to 1.9 times that of a smooth tube.At a height of h=0.7 mm,the Nu value has a large value,which is approximately 1.95～2.01 times that of a smooth tube.The results show that conical inner finned tubes with more racks,smaller fin spacing,and higher fin height have good heat transfer performance.This type of finned tube has the advantages of significantly increasing heat transfer area,significantly improving wing height,and being able to better break the thermal boundary layer.By comparing the friction coefficient,Nu value,and comprehensive evaluation index of corresponding finned tubes under different structural parameters,the optimal structural parameters of conical inner finned tubes are sought.关键词
锥形内翅片管/计算流体力学/传热性能/数值模拟Key words
conical inner finned tube/computational fluid dynamics/heat transfer performance/numerical simulation分类
能源科技引用本文复制引用
邓明江,黄书烽,蓝宁,彭海健..锥形内翅片管传热性能数值模拟研究[J].机电工程技术,2024,53(5):25-29,5.基金项目
江西省自然科学基金项目(20202BAB204021) （20202BAB204021）
江西省博后基金项目(2021KY50) （2021KY50）
江西省教育厅科技项目(GJJ200739) （GJJ200739）
